The Doghaiirx of I he Disfricf of (Johiinhui. S.') 



brons, reddish purple ; Imres spreading, oIjIohu;, niucronate-tipped, the 

 lowermost (about 85 x 40) somewliat rounded at base, the uppermost 

 tapering at eacli end ; npperside of leaves dark, clear green, glabrous ; un- 

 derside yellowish green, finely pubescent; petioles abouto mm. in length, 

 slender above, more robust below, finely pubeseent; oiforesicnire in small 

 rather compact, strictly terminal but not flat topped, cymes of numerous 

 sul)erect flowers, the cymes usually exceeded by the leaves ; ju'dicch l'-,'! 

 mm. in length, subulate bracted at base ; cahjr finely pubescent (this char- 

 acter probably inconstant), its segments broad, distinctly less than half 

 as long as corolla tube ; corolla light pink, or white strongly blotched with 

 ])ink inside, about 5-6 mm. in length, suburcoolate or tubular, its tube 

 distinctly pentagonal, the throat not narrowed, corolla segments rounded, 

 half as long as tube, spreading but not recurved; pods drooping, about 

 no mm. in length. 



Remarks. — Apocynnm medivm has essentially the habit of A. andros:vmr 

 foUnm though its peculiarities are slightly less pronounced. Together 

 with .1. nrcf'olifer it is readily distinguished from A. androsxmifoUnm by 

 its differently shaped leaves, much smaller suberect flowers in strictly 

 terminal racemes, and by the distinctly pentagonal corolla tube. The 

 form of the corolla tube varies in perfectly developed flowers from faintly 

 suburceolate to essentially short tubular, though the first is the more 

 usual. The calj^x segments are very short, conspicuously less than half 

 as long as corolla tube. In drying, the corolla shrinks more than the calyx, 

 so that in herbarium specimens the latter appears relatively longer than 

 it actually is. I have examined one hundred or more living plants of 

 this species growing in vacant lots on 12th St., Brookland, D. C, where 

 Dr. Greene informs me his original specimens were collected. 



Apocynum urceolifer sp. nov. 



, (PI. ir, Fig. 4.) 



Tijpr No. 340,390, United States National tlerl)arinm, collected on open, 

 dry hillside at Capitol View Park, Montgomery County, Maryland, July 

 2, bS9l), by Gerrit S. Miller, ,Jr. 



(jeograplur dislrihulion. — This species lias been collected at the type 

 locality and at Brightwood, I). C. 



Zonal position. — Apocynum nrceoJifcr'Mi probably a member of the Upper 

 Austral flora. 



Hahilal. — Fields and roadsides. 



Characters. — Plant slender, usually less than 1 m. high, from a perennial 

 horizontal rootstock ; branches dichotomously widely spreading, glabrous, 

 strongly tinged with reddish pur]:)le ; leares spreading, oblong, mucronate 

 tipped, the lowermost (about 1)0 x 40) rounded or subcordate at base, the 

 uppermost tapering at each end, but more abruptly at base; npperside 

 of leaves, clear green, glabrous; underside yellowish green, finely pubes- 

 cent; petioles 2-4 mm. in length, finely pubescent on lower side; inflores- 

 cence \i\ small, rather compact, but not flat-topped, strictly terminal cymes 

 of numerous suberect flowers, the cymes at first exceeded by the leaves, 



